<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: RobotCheckBehavior.class.php 2616 2012-01-16 08:36:46Z liu21st $

class RobotCheckBehavior extends Behavior {
	protected $options   =  array(
            'LIMIT_ROBOT_VISIT'=>true,
	);
	public function run(&$params) {
		// 机器人访问检测
		if(C('LIMIT_ROBOT_VISIT') && self::isRobot()) {
			// 禁止机器人访问
			exit('Access Denied');
		}
	}

	static private function isRobot() {
		static $_robot = null;
		if(is_null($_robot)) {
			$spiders = 'Bot|Crawl|Spider|slurp|sohu-search|lycos|robozilla';
			$browsers = 'MSIE|Netscape|Opera|Konqueror|Mozilla';
			if(preg_match("/($browsers)/", $_SERVER['HTTP_USER_AGENT'])) {
				$_robot	 =	  false ;
			} elseif(preg_match("/($spiders)/", $_SERVER['HTTP_USER_AGENT'])) {
				$_robot	 =	  true;
			} else {
				$_robot	 =	  false;
			}
		}
		return $_robot;
	}
}